硅烷含量对汽车钢板表面薄有机涂层防护性能的影响
Influence of Silane Content on Protective Performance of Thin Organic Coating on Automotive Galvanized Steel
摘 要
以环氧硅烷为交联剂,水性丙烯酸为成膜成分,从而改善汽车钢板表面薄有机涂层的防护性能。采用反射率测定仪、共聚焦激光扫描显微镜(CLSM)和扫描电子显微镜(SEM),研究了硅烷含量对薄有机涂层形貌、耐水性和耐蚀性的影响,并通过电化学阻抗谱分析了硅烷含量对涂层防护性能的影响。结果表明:当涂层中硅烷的质量分数不超过1.00%时,随着硅烷含量的增加,涂层的耐水性和耐蚀性均显著提高,对钢板的防护性能增强;当硅烷质量分数超过1.00%时,硅烷不能完全融入涂层中,导致涂层内部存在缺陷,其防护能力有所降低。
硅烷
涂层
腐蚀
电化学阻抗
化学交联
hot-dip galvanizing
silane
coating
corrosion
electrochemical impedance spectroscopy
chemical cross-linking
Abstract
Aiming at improving protective performance of thin organic coatings on automotive galvanized steels, the epoxy silane was used as a cross-linking agent, and waterborne acrylic resin as a film ingredient. Effect of silane content on morphology, water resistance and corrosive resistance properties were investigated using reflectivity tester, confocal laser scanning microscopy (CLSM) and scanning electron microscopy (SEM). The influence of silane content on the protective performance of the coating was analyzed by electrochemical impedance spectroscopy. The results showed that when the mass fraction of silane in the coating was less than 1.00%, with the increase of silane content, the water resistance and corrosive resistance of the coating were significantly improved, and the protective performance of the coating to the steel plate was enhanced. When the mass fraction of silane exceeded 1.00%, silane could not be completely integrated into the coating, which led to defects in the coating and reduced its protective ability.
中图分类号 TB37 DOI 10.11973/fsyfh-202212006
所属栏目 腐蚀电化学基础、技术与运用
基金项目 山西省基础研究计划(20210302123160);国家自然科学基金(52071227);中央引导地方科技发展专项(YDZX20191400002094);山西省科技重大专项(20191102006)
收稿日期 2021/8/4
修改稿日期
网络出版日期
作者单位点击查看
引用该论文: GAO Zhiqiang,REN Hongru,HOU Lifeng,LIU Xiaofang,ZHANG Zheng. Influence of Silane Content on Protective Performance of Thin Organic Coating on Automotive Galvanized Steel[J]. Corrosion & Protection, 2022, 43(12): 35
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【20】杨光,邓安仲,陈静波,等. 偶联剂改性纳米硅溶胶的接枝率及稳定性[J]. 材料科学与工程学报,2018,36(2):286-290.
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